OAA computing section circular NK 1509 C/1999 A1 (Tilbrook)

The following improved orbital elements, by S. Nakano, are from 64 observations 1999 Jan. 13 to Feb. 25. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.66 arc second. Epoch = 1999 Jan. 22.0 TT T = 1999 Jan. 29.65767 +/- 0.00058 (m.e.) TT Peri. = 232.67028 +/- 0.00091 Node = 259.12300 +/- 0.00054 (2000.0) Inc. = 89.48173 +/- 0.00082 q = 0.7307404 +/- 0.0000028 AU e = 0.9958768 +/- 0.0000419 1/a = +0.0056425 +/- 0.0000574 1/AU origin = +0.006273 (Q= 5) future = +0.005508 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1999/ 990115 372 0.1- 0.0 990118 897 0.7- 1.9- 990113 422 0.4+ 0.6- 990115 422 0.3+ 0.5- 990118 897 (0.9- 2.7-) 990113 422 0.0 0.2- 990115 422 0.2- 0.5- 990118 372 (0.8- 3.8+)Y 990113 422 0.7+ 0.1+ 990115 426 0.9+ 0.0 990118 426 (3.1- 0.5+) 990113 422 0.4+ 0.3- 990115 426 0.4+ 0.1- 990118 859 0.7- 1.1+ 990113 422 0.6+ 0.4- 990115 426 0.3+ 0.4+ 990118 859 0.8- 1.3+ 990113 422 0.4+ 0.0 990116 355 0.6- 1.1- 990118 859 0.6- 1.3+ 990113 426 0.3+ 0.8+ 990116 355 1.7- 0.8+ 990119 422 0.4- 0.9- 990113 426 0.1+ 0.6+ 990116 422 1.0- 0.6- 990119 422 0.1- 1.2- 990113 426 0.6+ 0.5+ 990116 422 1.2- 0.4- 990119 422 0.4- 0.9- 990113 426 0.6+ 0.2- 990116 422 1.4- 0.5- 990119 426 0.7+ 0.2- 990114 758 0.9- 1.4+ 990117 897 0.4- 0.3+ 990119 426 0.9+ 0.2+ 990114 758 (3.3+ 1.8-) 990117 897 0.6+ 0.5+ 990119 426 0.6+ 0.1+ 990114 758 (2.6+ 0.9+) 990117 897 1.3- 0.7- 990122 402 0.6+ 0.3- 990114 422 0.4- 0.0 990117 351 (4.1- 0.2-) 990122 402 (3.0+ 1.0+) 990114 422 0.0 0.4- 990117 351 (3.8- 3.9-) 990122 402 0.6+ 1.7+ 990114 422 0.3- 0.4- 990117 360 0.0 0.8+ 990204 426 0.1+ 0.4- 990114 422 0.2+ 0.4+ 990117 360 0.5+ 0.6+ 990204 426 0.1+ 0.1- 990114 422 0.3- 0.1- 990117 360 0.0 0.5+ 990204 426 0.1+ 0.4- 990114 422 0.1+ 0.2- 990117 360 0.4+ 0.8+ 990212 844 0.1- 0.0 990114 422 0.2- 0.0 990117 372 (1.2- 3.3+) 990212 844 (0.8+ 2.4-) 990114 426 0.0 0.1+ 990117 422 1.5- 0.6- 990212 844 0.9+ 0.5- 990114 426 0.6+ 0.2+ 990117 422 1.7- 0.4- 990224 844 (6.3- 4.1+) 990114 426 0.6+ 0.3- 990117 859 1.3+ 0.2- 990225 844 0.1- 0.7+ 990114 426 0.8+ 0.2+ 990117 859 0.9+ 0.4+ 990115 372 0.1+ 0.3- 990117 859 0.7+ 0.1- ( ) -------- Rejected Obs.

Director, Computing Section Late edition Syuichi Nakano 1999 Sept. 27

Back to Nakano Note Page